Potential applications of aerobic denitrifying bacteria as bioagents in wastewater treatment

Pai, Shwu-Ling; Chong, Nyuk-Min; Chen, Chei-Hsiang

doi:10.1016/s0960-8524(98)00140-0

Cited by 54 publications

(23 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…SND is significant at very low DO concentrations (0.2 mg/L), while at high concentrations (more than 1.0 m/L), aerobic denitrification is strongly inhibited (Pochana et al 1999). Another possible explanation is that aerobic denitrifying bacterium may be capable of converting nitrates to nitrogen gas consistent with the finding that the denitrification rate of the isolate bacteria (DCB-T6) was not affected by the presence of oxygen under oxic conditions (DO, 2-4 mg/L) (Pai et al 1999). Therefore, aerobic denitrification could exhibit good and stable performance in the oxic tanks on different DO levels.…”

Section: Mass Balancesupporting

confidence: 58%

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

Wang

Chen

2016

Journal of Environmental Sciences

View full text Add to dashboard Cite

Performance of a full-scale anoxic-oxic activated sludge treatment plant (4.0 × 10 5 m 3 /day for the first-stage project) was followed during a year. The plant performed well for the removal of carbon, nitrogen and phosphorus in the process of treating domestic wastewater within a temperature range of 10.8°C to 30.5°C. Mass balance calculations indicated that COD utilization mainly occurred in the anoxic phase, accounting for 88.2% of total COD removal. Ammonia nitrogen removal occurred 13.71% in the anoxic zones and 78.77% in the aerobic zones. The contribution of anoxic zones to total nitrogen (TN) removal was 57.41%.Results indicated that nitrogen elimination in the oxic tanks was mainly contributed by simultaneous nitrification and denitrification (SND). The reduction of phosphorus mainly took place in the oxic zones, 61.46% of the total removal. Denitrifying phosphorus removal was achieved biologically by 11.29%. Practical experience proved that adaptability to gradually changing temperature of the microbial populations was important to maintain the plant overall stability. Sudden changes in temperature did not cause paralysis of the system just lower removal efficiency, which could be explained by functional redundancy of microorganisms that may compensate the adverse effects of temperature changes to a certain degree. Anoxic-oxic process without internal recycling has great potential to treat low strength wastewater (i.e., TN < 35 mg/L) as well as reducing operation costs.

show abstract

Section: Mass Balancesupporting

confidence: 58%

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

Wang

Chen

2016

Journal of Environmental Sciences

View full text Add to dashboard Cite

show abstract

“…A solution of synthetic wastewater, pH 7, containing 50 mM each of sodium nitrate (NaNO 3 ), ammonium chloride (NH 4 Cl), monosodium phosphate (NaH 2 PO 4 ), disodium phosphate (Na 2 HPO 4 ), and potassium sulfate (K 2 SO 4 ) was also used. 31 Amperometry was performed with the same three electrode system. The potential was held at −0.6 V vs SCE.…”

Section: Methodsmentioning

confidence: 99%

“…Several species of Geobacter have been shown to reduce nitrates. [30][31][32] Geobacter sulfurreducens has been electrochemically studied as a biofilm 18,19,33 as well as immobilized on carbon electrodes by pectin, 20 where DET still occurred when the G. sulfurreducens were immobilized on the electrode without forming a biofilm.…”

Section: F652mentioning

confidence: 99%

A Self-Sufficient Nitrate Groundwater Remediation System:Geobacter SulfurreducensMicrobial Fuel Cell Fed by Hydrogen from a Water Electrolyzer

Knoche

Renner

Gellett

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

Nitrate contamination of groundwater is a major problem, especially in farming areas where nitrogen-based fertilizers are used. Geobacter sulfurreducens electrodes were electrochemically evaluated for their ability to reduce nitrate with implications for groundwater remediation. G. sulfurreducens were optimized for nitrate reduction by modifying growth media during subculture. The Geobacter were then cast on Toray carbon paper electrodes and immobilized with pectin. Cyclic voltammetry demonstrated that the electrodes bioelectrocatalytically reduce nitrate with an onset potential of −0.25 V vs. SCE. Amperometry was used to evaluate nitrate concentrations between 0.5 and 270 mM. The limit of detection is 8 mM with a linear range of 20 mM to 160 mM. Evaluation by a Michaelis Menten kinetic model yields a K M of 110 ± 10 mM. The Geobacter sulfurreducens electrodes were incorporated into a nitrate reducing microbial fuel cell which was fed nitrate contaminated water by a peristaltic pump and hydrogen from a proton exchange membrane (PEM)-based water electrolysis cell and yielded a remediation rate of 6 mg/cm 2 /day.

show abstract

“…Frette et al [20] isolated 16 denitrifiers from an intermittent anaerobic/aerobic wastewater treatment tank that denitrified under either aerobic or anaerobic condition. Pai et al [21] isolated three aerobic denitrifiers from corn sediment, one of which, the T6 germ, can grow utilizing inorganic nitrogen, i.e., NH…”

Section: Aerobic Denitrifiersmentioning

confidence: 99%

“…Recently, some other bacteria have shown aerobic denitrification capability, such as Hyphomicrobium X [22] , Klebsiella [23] , Ochrobactrum [24] and Zoogloea [21] . By adopting two sequencing batch reactors (SBRs), nitrate as the substrate, and an intermittent aeration mode, activated sludge was domesticated to enrich aerobic denitrifiers.…”

Section: +mentioning

confidence: 99%

Aerobic Denitrifiers: Characteristics and Recent Research

Li¹,

Wang²,

Huang³

2017

Proceedings of the 2017 2nd International Conference on Materials Science, Machinery and Energy Engineering (MSMEE 2017)

View full text Add to dashboard Cite

Abstract. The presence of nitrogenous substances in wastewater discharges has attracted attention because of the role of nitrogen in eutrophication of receiving waters. Nitrogen removal is an important aspect of present day wastewater treatment processes. However, conventional nitrification-denitrification treatment is uneconomical and difficult to operate due to extremely slow nitrification and the necessity for separate nitrification and denitrification reactors. Recently, several novel aerobic denitrification processes have been developed for cost-effective biological nitrogen removal. These processes can reduce inorganic nitrate compounds to harmless nitrogen gas. Aerobic denitrification bacteria screened and identified in recent years and the nitrogen removal effects of those bacteria are summarized.

show abstract

Potential applications of aerobic denitrifying bacteria as bioagents in wastewater treatment

Cited by 54 publications

References 8 publications

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

Simultaneous denitrification and denitrifying phosphorus removal in a full-scale anoxic–oxic process without internal recycle treating low strength wastewater

A Self-Sufficient Nitrate Groundwater Remediation System:Geobacter SulfurreducensMicrobial Fuel Cell Fed by Hydrogen from a Water Electrolyzer

Aerobic Denitrifiers: Characteristics and Recent Research

Contact Info

Product

Resources

About